Carburetor mounting means



March 1, 1966 F. J. WINCHELL CARBURETOR MOUNTING MEANS Filed Oct. 7,1964 I N V E N TOR. 77.22% ZZZ mafia QKW United States Patent 3,237,618CARBURETOR MOUNTING MEANS Frank J. Winchell, Bloomfield Hills, Mich.,assignor to General Motors Corporation, Detroit, Mich., a corporation ofDelaware Filed Oct. 7, 1964, Ser. No. 402,306 Claims. (Cl. 123-122) Thisinvention relates to internal combustion engines and more particularlyto a carburetor mounting means.

One feature of this invention is that it provides improved means formounting a carburetor on an engine manifold.

Another feature of this invention is that it provides improved means formounting a carburetor on both an intake manifold and an exhaust manifoldas well as providing means for heating the combustible mixture withinthe carburetor from the exhaust manifold.

A further feature of this invention is that it provides a saddle membermounting a carburetor on an intake manifold and an exhaust manifold andincluding a sump for collecting unatomized fuel and locating thisunatomized fuel so as to be vaporized by the heat from the exhaustmanifold.

These and other features of this invention will be ap parent from thefollowing specification and drawing wherein:

FIGURE 1 is an elevational view of an internal combustion engineembodying a carburetor mounting means of this invention;

FIGURE 2 is an enlarged sectional view taken generally along the planeindicated by line 2-2 of FIGURE 1; and

FIGURE 3 is a sectional view taken generally along the plane indicatedby line 3-3 of FIGURE 2.

Referring now to the drawing, an air cooled opposed cylinder internalcombustion engine designated generally includes intake manifolds 12 forsupplying combustible mixture to the opposite banks of cylinders and anexhaust manifold 14 for collecting exhaust gases from the banks ofcylinders. A carburetor 16 having an induction passage 18 is adapted tosupply the combustible mixture to the manifolds 12 as will be described.

The carburetor mounting means of this invention includes a saddle member20 having a generally U shaped saddle portion 22 which seats on acrossover portion 24 of the exhaust manifold 14. The carburetor 16 ismounted on the saddle member at the end opposite the U shaped saddleportion. A U bolt 26 surrounds both the saddle member and the crossoverportion 24 of the exhaust manifold and threaded ends thereof arereceived within aligned openings provided in flanges 28 and 30 of thesaddle memher and carburetor. Nuts 32 secure the saddle member to theexhaust manifold as well as mount the carburetor on the saddle member.

A generally vertically disposed passageway 34 extends through the saddlemember and opens at its lower end through a reduced diameter portion 36to a portion 38 of the surface of the manifold 14, and at its upper endto the induction passage 18 of the carburetor 16. A second passageway 40extends generally normal and transverse of the passageway 34 and theopenings 42 of this passageway receive the enlarged ends of themanifolds 12 to thereby communicate the induction passage and the intakemanifolds. Thus, the intake passage of the engine is formed by theinduction passage 18 of the carburetor, the passageways 34 and 40 of thesaddle member and the intake manifolds.

. When the engine is in operation hot exhaust gases flowing through theexhaust manifold raise the temperature of the manifold and thereby heatthe saddle member and the combustible mixture passing through the intakepas- 3,237,618 Patented Mar. 1, 1966 sage. Heating the combustiblemixture improves the efficiency and operation of the engine as is wellknown. Any liquid fuel which is not vaporized in the carburetor duringthe operation of the engine or which drips from the carburetor when theengine is not in operation will collect in a sump formed by the portion36 of the passageway 34 of the saddle member and the portion 38 of theexhaust manifold. When the engine is operating, the heat of the exhaustgas will vaporize the liquid fuel in this sump so that it will flowthrough the intake passage to the engine.

Thus, this invention provides an improved carburetor mounting means.

I claim:

1. In an internal combustion engine having an intake manifold adapted toconvey a combustible mixture to the engine, an exhaust manifold adaptedto convey exhaust gas from the engine and a carburetor, carburetormounting means comprising: support means seating on said exhaustmanifold and mounting said carburetor, said support means includingpassageway means communicating said carburetor and said intake manifold,a portion of said passageway means opening to the exterior of saidexhaust manifold to heat the combustible mixture passing therethrough.

2. In an internal combustion engine having an intake manifold adapted toconvey a combustible mixture to the engine, an exhaust manifold adaptedto convey exhaust gas from the engine, a carburetor having an inductionpassage, carburetor mounting means comprising: a saddle member having afirst opening therein receiving an end of said intake manifold and asecond opening intersecting said first opening, means mounting saidcarburetor on said saddle member with the carburetor induction passagecommunicating with said second opening, said saddle member seating onsaid exhaust manifold to heat the combustible mixture passingtherethrough.

3. In an internal combustion engine having a plurality of intakemanifolds adapted to convey a combustible mixture to the engine, anexhaust manifold adapted to convey exhaust gas from the engine, and acarburetor having an induction passage, carburetor mounting meanscomprising: a saddle member having a plurality of openings eachreceiving an end of one of said intake manifolds, a passageway extendingthrough said saddle member and intersecting said plurality of openings,means mounting said carburetor on said saddle member with the carburetorinduction passage communicating with said passageway, said saddle memberseating on said exhaust manifold and sealing one end of said passageway.

4. The combination comprising: an internal combustion engine having twointake manifolds adapted to convey a combustible mixture to the engine,an exhaust manifold adapted to convey exhaust gas from the engine, acarburetor having an induction passage, a saddle member having a firstbore receiving the ends of said intake manifolds and providing a passagetherebetween, a second bore intersecting said first bore, means mountingsaid carburetor on said saddle member with the carburetor inductionpassage communicating with one end of said second bore, and meansmounting said saddle member on said exhaust manifold and sealing the endof said second bore opposite said one end.

5. In an internal combustion engine having an intake manifold adapted toconvey a combustible mixture to the engine, an exhaust manifold adaptedto collect exhaust gas from the engine, and a carburetor having aninduction passage, a member having a port-ion there-of adapted to seaton said exhaust manifold, first means connecting the induction passageof said car-buretor with said rneinber, second means connecting saidintake manifold to said member and communicating with said first means,and a passageway Within said member communicating with said first andsecond means and opening to a portion of the surface of said exhaustmanifold, said passageway and said portion of the surface of saidmanifold providing a sump to collect unatomized fuel, the heat from saidexhaust manifold atomizing the fuel collected in said sump.

References Cited by the Examiner UNITED STATES PATENTS 10/1941 Morris123122 5 KARL I. ALBRECHT, Primary Examiner.

1. IN AN INTERNAL COMBUSTION ENGINE HAVING AN INTAKE MANIFOLD ADAPTED TOCONVEY A COMBUSTILE MIXTURE TO THE ENGINE, AN EXHAUST MANIFOLD ADAPTEDTO CONVEY EXHAUST GAS FROM THE ENGINE AND A CARBURETOR, CARBURETORMOUNTING MEANS COMPRISING: SUPPORT MEANS SEATING ON SAID EXHAUSTMANIFOLD AND MOUNTING SAID CARBURETOR, SAID SUPPORT MEANS INCLUDINGPASSAGEWAY MEANS COMMUNICATING SAID CARBURETOR AND SAID INTAKE MANIFOLD,A PORTION OF SAID PASSAGEWAY MEANS OPENING TO THE EXTERIOR OF SAIDEXHAUST MANIFOLD TO HEAT THE COMBUSTILE MIXTURE PASSING THERETHROUGH.